如何将 ILogger 注入 EFCore DbContext

Question

我有带有 EFCore 数据库上下文的 .net core 应用程序：

public class MyappDbContext : DbContext
{
    private ILogger<MyappDbContext> _logger;

    public MyappDbContext(DbContextOptions<MyappDbContext> options)
        : base(options)
    {
        // ???
    }
}

在启动类中我注册了上下文：

services.AddDbContext<MyappDbContext>(options => options.UseSqlServer(connectionString));

如何注入MyappDbContext, ILoggeror ILoggerFactory（创建记录器）？

Answer 1

您需要做的就是向上下文构造函数添加一个ILoggerFactoryor参数：ILogger

public class MyappDbContext : DbContext
{
    private readonly ILogger<MyappDbContext> _logger;

    public MyappDbContext(DbContextOptions<MyappDbContext> options,
        ILogger<MyappDbContext> logger)
        : base(options)
    {
        _logger = logger;
    }
}